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Lukas1
Visitor II
April 21, 2020
Solved

STM32MP157C-DK2 maximum current 5V/3V3 pins

  • April 21, 2020
  • 1 reply
  • 735 views

Hi,

I want to connect some shields/sensors to STM32MP157C-DK2. Some of the sensors will draw about 200mA. How much current can I draw from the 5V/3V3 pins on the GPIO expansion connectors?

The STM32MP157C-DK2 is powered over USB-C 5V/3A. OpenSTLinux is running on A7 and firmware on M4

regards

Lukas

    This topic has been closed for replies.
    Best answer by PatrickF

    Hello,

    for 5V, there is no specific limit, as you draw directly from USB Type-C connector. You should just ensure the power drawn by external devices connected on the 4 x USB Type-A (up to 500mA each) added with the 5V power drawn on your expansion is lower than 5V 2A (this give a comfortable 5V 1A for the remaining of the board).

    For 3.3V, supplied by STPMIC1A Buck4 rated 2A, I did not have split of power used inside the DK2, but at a first guess, up to 500mA for expansion should be ok.

    Regards

    1 reply

    P
    PatrickFAnswer
    Technical Moderator
    April 21, 2020

    Hello,

    for 5V, there is no specific limit, as you draw directly from USB Type-C connector. You should just ensure the power drawn by external devices connected on the 4 x USB Type-A (up to 500mA each) added with the 5V power drawn on your expansion is lower than 5V 2A (this give a comfortable 5V 1A for the remaining of the board).

    For 3.3V, supplied by STPMIC1A Buck4 rated 2A, I did not have split of power used inside the DK2, but at a first guess, up to 500mA for expansion should be ok.

    Regards

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